Yes but you have to use a different syntax.

    oneSlice := []int{1, 1, 1, 1, 1}

It&#39;s referred to as &#39;composite literal&#39;

Also, if there is reason to iterate (like calculating the values based loop variable or something) then you could use the `range` keyword rather than the old school for i is equal to, i is less than, i++ loop.

    for i := range onesSlice {
        onesSlice[i] = 1
    }


Can I use `argparse` to read named command line arguments that do not need to be in a specific order? I browsed through the [documentation][1] but most of it focused on displaying content based on the arguments provided (such as `--h`).

Right now, my script reads ordered, unnamed arguments:

&gt;myscript.py foo-val bar-val

using `sys.argv`:

    foo = sys.argv[1]
    bar = sys.argv[2]

But I would like to change the input so that it is order agnostic by naming arguments:

&gt;myscript.py --bar=bar-val --foo=foo-val 



  [1]: https://docs.python.org/3/library/argparse.html

Reading named command arguments

I&#39;m developing an app that requires user to select date(dd/mm/yyyy).
I want to show a dialog box with DatePicker on button click.
once date is selected it must show in EditText.

I&#39;m using Android Studio 2.2, project with min sdk is 23.

Kindly help me to do required code.

How to show DatePickerDialog on Button click?

Is it possible to initialize an slice with all 1&#39;s like in python?

PYTHON:

    onesArray = np.ones(5)
    onesList = [1]*5

GOLANG

    onesSlice := make([]int, 5)
    for i:= 0; i &lt; len(onesSlice); i++{
        onesSlice[i] = 1
    }

Is it possible to do better than this?

Is it possible to initialize slice with specific values?

Is it possible to initialize an slice with all 1's like in python?
PYTHON:
<pre><code class="hljs language-ini">onesArray = np.ones(5)
onesList = [1]*5
</code></pre>
GOLANG
<pre><code class="hljs language-css">onesSlice := make([]int, 5)
for i:= 0; i &#x3C; len(onesSlice); i++{
 onesSlice[i] = 1
}
</code></pre>
Is it possible to do better than this?

In Go, I am trying to make a scramble slice function for my traveling salesman problem. While doing this I noticed when I started editing the slice I gave the scramble function was different every time I passed it in.

After some debugging I found out it was due to me editing the slice inside the function. But since Go is supposed to be a &quot;pass by value&quot; language, how is this possible? 

https://play.golang.org/p/mMivoH0TuV

I have provided a playground link to show what I mean.
By removing line 27 you get a different output than leaving it in, this should not make a difference since the function is supposed to make its own copy of the slice when passed in as an argument.  
Can someone explain the phenomenon?

Are slices passed by value?

How do I set the HTTP status code on an `http.ResponseWriter` (e.g. to 500 or 403)?

I can see that requests normally have a status code of 200 attached to them.


How to set HTTP status code on http.ResponseWriter

Very new to the &#39;Go&#39;. Question might be basic one.

I have two time.Time objects and I want to get the difference between the two in terms of hours/minutes/seconds. Lets say:

    t1 = 2016-09-09 19:09:16 +0530 IST
    t2 = 2016-09-09 19:09:16 +0530 IST

In above case, since the difference is 0. It should give me 00:00:00. Consider another case:

    t1 = 2016-09-14 14:12:48 +0530 IST
    t2 = 2016-09-14 14:18:29 +0530 IST

In this case, difference would be 00:05:41. I looked at the https://godoc.org/time but could not make anything out of it.

Difference between two time.Time objects

How to append a character to a string in Go?

This does not work:

	s := &quot;hello&quot;;
	c := &#39;x&#39;; 
	fmt.Println(s + c);
*invalid operation: s + c (mismatched types string and rune)*

This does not work either:

	s := &quot;hello&quot;;
	c := &#39;x&#39;; 
	fmt.Println(s + rune(c));
*invalid operation: s + rune(c) (mismatched types string and rune)*

How to append a character to a string in Golang?

How do you assign a default value if an environment variable isn&#39;t set in Go?

In Python I could do `mongo_password = os.getenv(&#39;MONGO_PASS&#39;, &#39;pass&#39;)` where `pass` is the default value if `MONGO_PASS` env var isn&#39;t set.

I tried an if statement based on `os.Getenv` being empty, but that doesn&#39;t seem to work due to the scope of variable assignment within an if statement. And I&#39;m checking for multiple env var&#39;s, so I can&#39;t act on this information within the if statement.

How to assign default value if env var is empty?

What is the difference between cap and len of a slice in golang?

According to definition:

A slice has both a length and a capacity.

The length of a slice is the number of elements it contains.

The capacity of a slice is the number of elements in the underlying array, counting from the first element in the slice.

    x := make([]int, 0, 5) // len(b)=0, cap(b)=5

Does the len mean non null values only?

cap vs len of slice in golang

I have a large dataframe (&gt;3MM rows) that I&#39;m trying to pass through a function (the one below is largely simplified), and I keep getting a `Memory Error` message. 

I think I&#39;m passing too large of a dataframe into the function, so I&#39;m trying to:

1) Slice the dataframe into smaller chunks **(preferably sliced by `AcctName`)**

2) Pass the dataframe into the function

3) Concatenate the dataframes back into one large dataframe

    def trans_times_2(df):
        df[&#39;Double_Transaction&#39;] = df[&#39;Transaction&#39;] * 2
 
    large_df 
    AcctName   Timestamp    Transaction
    ABC        12/1         12.12
    ABC        12/2         20.89
    ABC        12/3         51.93    
    DEF        12/2         13.12
    DEF        12/8          9.93
    DEF        12/9         92.09
    GHI        12/1         14.33
    GHI        12/6         21.99
    GHI        12/12        98.81



I know that my function works properly, since it will work on a smaller dataframe (e.g. 40,000 rows). I tried the following, but I was unsuccessful with concatenating the small dataframes back into one large dataframe.

    def split_df(df):
        new_df = []
        AcctNames = df.AcctName.unique()
        DataFrameDict = {elem: pd.DataFrame for elem in AcctNames}
        key_list = [k for k in DataFrameDict.keys()]
        new_df = []
        for key in DataFrameDict.keys():
            DataFrameDict[key] = df[:][df.AcctNames == key]
            trans_times_2(DataFrameDict[key])
        rejoined_df = pd.concat(new_df)

**How I envision the dataframes being split:**

    df1
    AcctName   Timestamp    Transaction  Double_Transaction
    ABC        12/1         12.12        24.24
    ABC        12/2         20.89        41.78
    ABC        12/3         51.93        103.86
  
    df2
    AcctName   Timestamp    Transaction  Double_Transaction
    DEF        12/2         13.12        26.24
    DEF        12/8          9.93        19.86
    DEF        12/9         92.09        184.18

    df3
    AcctName   Timestamp    Transaction  Double_Transaction
    GHI        12/1         14.33        28.66
    GHI        12/6         21.99        43.98
    GHI        12/12        98.81        197.62

    

Pandas - Slice large dataframe into chunks

Given

	array1 := []int{1, 3, 4, 5}
	array2 := []int{2, 4, 6, 8}

I want to insert `array2[2]` i.e `6` at `array1[1]` i.e before `3` so that `array1` becomes a slice of `{1, 6, 3, 4, 5}`. How can I do it?

Most the techniques I read online involve using the `:` operator but results in remaining elements being inserted as well. How can I append single values at an index in a slice?


Insert a value in a slice at a given index

Is there an equivalent of list slicing `[1:]` from Python in C++ with vectors? I simply want to get all but the first element from a vector.

Python&#39;s list slicing operator:

    list1 = [1, 2, 3]
    list2 = list1[1:]  

    print(list2) # [2, 3]

C++ Desired result:

    std::vector&lt;int&gt; v1 = {1, 2, 3};
    std::vector&lt;int&gt; v2;
    v2 = v1[1:];

    std::cout &lt;&lt; v2 &lt;&lt; std::endl;  //{2, 3}

Content Type	Original Author	Original Content on Stackoverflow
Question	Nicky Feller	View Question on Stackoverflow
Solution 1 - Go	evanmcdonnal	View Answer on Stackoverflow

Is it possible to initialize slice with specific values?

Go Problem Overview

Go Solutions

Solution 1 - Go

How to show DatePickerDialog on Button click?

Reading named command arguments

Attributions